315523997 has 2 divisors, whose sum is σ = 315523998. Its totient is φ = 315523996.

The previous prime is 315523991. The next prime is 315524009. The reversal of 315523997 is 799325513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 240684196 + 74839801 = 15514^2 + 8651^2 .

It is a cyclic number.

It is not a de Polignac number, because 315523997 - 2¹² = 315519901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315523991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157761998 + 157761999.

It is an arithmetic number, because the mean of its divisors is an integer number (157761999).

Almost surely, 2^315523997 is an apocalyptic number.

It is an amenable number.

315523997 is a deficient number, since it is larger than the sum of its proper divisors (1).

315523997 is an equidigital number, since it uses as much as digits as its factorization.

315523997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 255150, while the sum is 44.

The square root of 315523997 is about 17762.9951584748. The cubic root of 315523997 is about 680.7862855350.

The spelling of 315523997 in words is "three hundred fifteen million, five hundred twenty-three thousand, nine hundred ninety-seven".